Portable hoist



w. J. HERRBOLD.

PORTABLE HOIST.

APPLICATION FILED JUNE 19; I920.

Patented Oct. '11, 1921.

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F ..IL q/vi/b vwaow t UNITED STATES PATENT OFFICE.

WILLIAM 3'. HERBBOLD, OF KALAMAZOO, I'KICI'IIGAN.

PUB/TABLE HGIST.

Specification of Letters Patent.

Patented Oct. 11, 1921.

Application filed June 19, 1820. Serial No. 390,121.

Kalamazoo, county of Kalamazoo, State of Michigan, have invented certain new and useful Improvements in Portable Hoists, of which the following is a specification.

This invention relates to improvements in portable hoists.

The main objects of this invention are to provide an improved portable hoist or hoisting truck for handling heavy objects and also objects of considerable size, in factories and in mills such as paper mills. A further object is to provide a portable hoist which is very convenient to use and at the same time quite simple in structure.

Further objects, and objects relating to structural details will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a side elevation of my im proved portable hoist, a portion of one of the standards being broken away to show structural details.

Fig. II is a front elevation of the structure shown in Fig. I.

Fig. III is a detail view partially in horizontal section on a line corresponding to line 33 of Figs. I and IV, showing details of the lifting screw drivin means.

Fig. IV is a detail view partially in vertical section on a line corresponding to line 4-4 of Figs. I and III.

Fig. V is a detail view partially in vertical section on a line corresponding to line 5-5 of Fig. II, showing details of the support for the lifting screws.

In the drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, I provide four tubular standards 1 which are connected in pairs by the side braces 2, the braces in the structure illustrated beil g diagonally disposed. The rear carrying wheels 3 are mounted on the rear axle 4 which is secured to the lower ends of the rear pair of standards. The front carrying wheels5 are mounted on the axle 6, pivoted or supported by the king bolt 7 carried by the cross piece 8 at the lower ends of the front pair of standards.

The lifting screws 9 are disposed in the standards and are provided with cross heads 10 at theirupper ends. The lifting screws are slidably supported by bearing blocks 11 and 12, the bearing blocks 12 being arranged at the upper ends of the standards and the bearing blocks 11 being arranged at a considerable distance therefrom so that the screws are supported for vertical movement. These bearing blocks are preferably of wood so as not to injure the screws. The lifting nuts 13 are supported by the lower blocks 11.

The driving rods or shafts 14 are mounted in cars 15 on the outer sides of the standards. On these shafts are driving worms 16 projecting through openings 17 to mesh with the nuts 13. The shafts 14 are provided with hand wheels 18 at their front ends so that the screws may be raised and lowered as desired.

The track 19 is mounted centrally of the cross heads 10 so that the tackle carriage 20 may move back and forth thereon. A tackle 21 is shown conventionally in Fig. I.

My improved portable hoist or hoisting truck is especially adapted for use in handling heavy objects and objects of considerable size in factories and mills such as paper mills, for instance, the rolls of a paper making machine. In such use the truck may be backed up and the parts adjusted so that the track will be in alinement with the I-beam above the paper making machine and the carriage run from the track onto the I-beam and vice versa in removing or replacing the roll. I have not attempted in the accompanying drawing to show the relative proportion of parts, the drawings being illustrative only.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a structure of the class described, the combination of tubular standards, side braces connecting said standards in pairs, carrying wheels, axles therefor mounted on the lower ends of said standards, lifting screws disposed within said standards, bearing blocks arranged within said standards to slidably support said screws, worm driving nuts supported within said standards by said bearing blocks, driving shafts mounted on the outer sides of the standards, driving worms mounted on said shafts and projecting through openings therein to 00- act with said nuts, cross heads mounted on said screws, a track mounted centrally on said cross heads, and a tackle carriage on said track. I a

' 2. In a structure of the class described, the combination of tubular standards, side braces connecting said standards in pairs, carrying wheels, axles therefor mounted on the lower ends of said standards, lifting screws disposed within said standards, worm driving nuts supported within said standards, driving shafts mounted on the outer sides of the standards, driving, worms mounted on said shafts and projecting through openings therein to coact with said nuts, cross heads mounted on said screws, a track mounted centrally on said cross heads, and a tackle carriage on said track.

3. In a structure of the class described, the combination of a frame comprising tubular standards, carryin wheels, lifting screws disposed within said standards, worm driving nuts supported within said standards, driving shafts mounted on said standards, driving worms mounted on said shafts to coact with said nuts, cross heads mounted on said screws, a track mounted on said cross heads, and a tackle carriage on said track.

In witness; whereof I'have hereunto set my hand and seal in the presence of twofwitnesses, 7

WILLIAM J. HERRBQLD. [1 s.]

Witnesses: I

GRAcE B. THOMPSON, MARGARETL. GLASGOW 

